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It is known [1–4] that corrosive media intensify the fracture of metallic materials under long-term loads (static or cyclic) and lead to the propagation of corrosion-fatigue cracks. For the determination of the residual life-time of structural elements under these conditions, it is necessary to have the corresponding estimation models. The majority of the known models [1–4] are based only on specific experimental results. By using these results, it is possible to determine the residual recourse only for some structural elements with certain materials. The influence of corrosive media on the fracture of power-generating equipment elements is studied insufficiently, in particular a wheels of steam turbines. In the present work, the estimation model is constructed and accordingly method for evaluation of influence of corrosive media on the residual life-time of wheels of steam turbines under the action cyclic load.

Influence of Corrosive-Aggression Medium on the Residual Resource of Annular Wheel of Steam Turbine under Variable Loads